Regarding push-pull, I´m thinking about buying a Gentle Typhoon 1850rpm but I dont want it the spin at full speed, do you believe the pump fan connector adapts the voltage according the temperature, to reduce rpm when not needed? Or will I have to buy a 3 pin low voltage adapter of some sort, if it exists?

I think the 760gc has fixed pump speed, but I may be wrong.
I know about the noctuas adapters but they are 4 pin a(pwm) and the gentle typhoon AP-15 I was thinking about buying are 3 pin (non-pwm)

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Check edited previous post.
You can put 3 pin fan headers into 4 pin connectors. A 4 pin connector is exactly the same as a 3 pin, it just has an extra pin for controlling the speed(PWN). See this diagram for how to plug a 3 pin into a 4 pin.

Check edited previous post.
You can put 3 pin fan headers into 4 pin connectors. A 4 pin connector is exactly the same as a 3 pin, it just has an extra pin for controlling the speed(PWN). See this diagram for how to plug a 3 pin into a 4 pin.http://www.singapore-pc-servicing.com/cpu_fan/image002.jpg

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So if I put the 3 pin fan connector on a 4 pin low voltage adapter it will reduce the voltage and therefore the rpm? If so and if it was you, would you connect the GT-15 to the pump connector on to a 3 pin motherboard fan header?
Once again thanks for ur input, you are being very helpfull

So if I put the 3 pin fan connector on a 4 pin low voltage adapter it will reduce the voltage and therefore the rpm? If so and if it was you, would you connect the GT-15 to the pump connector on to a 3 pin motherboard fan header?
Once again thanks for ur input, you are being very helpfull

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After talking to some other people, I have some more solid advice on push-pull. They said it should make a considerable difference, and is definitely worth it.

Personally I would connect it to the motherboard, as this would allow me to make custom fan curves and adjust the RPM in the BIOS. (I do not know if your board supports that). And yes, the low voltage adapter will lower the RPM. Although if you did not want to do that, you should be able to connect them both to the asetek unit, using the included Y cable with the Noctua fans.
Although I would run both the noctua's on the 760gc, and the gentle typhoon on just the graphics card cooler. Using 2 different fans on a radiator, can limit fan performance, as they will be running at different RPM's, and therefore causing issues to the fan in pull, as it will be getting too much/not enough air, and it will start to slow down/go faster then it's meant to, and wear the bearings.

After talking to some other people, I have some more solid advice on push-pull. They said it should make a considerable difference, and is definitely worth it.

Personally I would connect it to the motherboard, as this would allow me to make custom fan curves and adjust the RPM in the BIOS. (I do not know if your board supports that). And yes, the low voltage adapter will lower the RPM. Although if you did not want to do that, you should be able to connect them both to the asetek unit, using the included Y cable with the Noctua fans.
Although I would run both the noctua's on the 760gc, and the gentle typhoon on just the graphics card cooler. Using 2 different fans on a radiator, can limit fan performance, as they will be running at different RPM's, and therefore causing issues to the fan in pull, as it will be getting too much/not enough air, and it will start to slow down/go faster then it's meant to, and wear the bearings.

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Martin from Martin Liquid Lab (martinsliquidlab.org) a known independent fan/pump/wc kits reviewer says he is in favor of using different fans on radiators (check here, post 38: http://www.overclock.net/t/1376811/corsair-sp120-quiet-edition-vs-noctua-nf-f12/30#post_19805606)
Tator Tot (a overclock.net user that also seems to know about fans) says that using two NF-F12 on radiators in push-pull makes them noisy...dont know if its true, will have to check when I install everything.

My Asus P8Z68-V Pro dosent seem to be able to change the voltage on the 2 chassis fan adapters, at least in speed fan, is there another option? The Asus Q-Fan setting in BIOS is seems to work but there is no graph I can make only a turbo, a standard and a silent option, and I sure dont know the difference.
I was thinking about connecting both Noctuas NF-F12 PWM fans on the Motherboard 4 pin PWM CPU_1 and CPU_2 fan adapters and the GT-15 to the Pump fan adapter has you said.
But if you believe the noctua fans connected to the pump fan adapter would really adapt the fan speed according to temps I will do it. Where did you read that info?

Martin from Martin Liquid Lab (martinsliquidlab.org) a known independent fan/pump/wc kits reviewer says he is in favor of using different fans on radiators (check here, post 38: http://www.overclock.net/t/1376811/corsair-sp120-quiet-edition-vs-noctua-nf-f12/30#post_19805606)
Tator Tot (a overclock.net user that also seems to know about fans) says that using two NF-F12 on radiators in push-pull makes them noisy...dont know if its true, will have to check when I install everything.

My Asus P8Z68-V Pro dosent seem to be able to change the voltage on the 2 chassis fan adapters, at least in speed fan, is there another option? The Asus Q-Fan setting in BIOS is seems to work but there is no graph I can make only a turbo, a standard and a silent option, and I sure dont know the difference.
I was thinking about connecting both Noctuas NF-F12 PWM fans on the Motherboard 4 pin PWM CPU_1 and CPU_2 fan adapters and the GT-15 to the Pump fan adapter has you said.
But if you believe the noctua fans connected to the pump fan adapter would really adapt the fan speed according to temps I will do it. Where did you read that info?

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Well, obviously I was believing the forum myth! You should definitely listen to Martin, he has an extreme amount of knowledge on this stuff.

So I can connect the 4 pin noctuas to the 3 pin pump connector... I bought PWM fans because I thought it would be the best way to automatically control the speed and reduce the noise in a efficient way... And now I noticed I could have bought the cheaper (and better it seems) gentle typhoons ap 15 :-(
The only problem I see with connecting the fan to the 740gf pump connector is that that it would had to also power the pump itself and the vrm fan, has the device only gets power from the VGA fan header. Seems to me that could be too much voltage and it could damage it, what do you think?

So I can connect the 4 pin noctuas to the 3 pin pump connector... I bought PWM fans because I thought it would be the best way to automatically control the speed and reduce the noise in a efficient way... And now I noticed I could have bought the cheaper (and better it seems) gentle typhoons ap 15 :-(
The only problem I see with connecting the fan to the 740gf pump connector is that that it would had to also power the pump itself and the vrm fan, has the device only gets power from the VGA fan header. Seems to me that could be too much voltage and it could damage it, what do you think?

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I do not have any idea how many watts/amps the VGA fan header is, and what the requirements of the pump and 2 fans are. This is why I recommended the motherboard fan control option.

I think I will run the 740GF from the Motherboard, as you sugested, probably a Noctua NF-F12PWM. Is there isnt a way to make that PWM fan RPMs change according to GPU temperature?

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If FanXpert does not have GPU temp control, and you cannot find an external program that views gpu temps and allows you to setup fan curves, you would actually have to use the gpu fan header, and then setup fan curves from a GPU tweaking program.

If FanXpert does not have GPU temp control, and you cannot find an external program that views gpu temps and allows you to setup fan curves, you would actually have to use the gpu fan header, and then setup fan curves from a GPU tweaking program.

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That's what I thought, if the 740gf was designed like that it should work, right? ;-)
What about you, what wc components do you have?

That's what I thought, if the 740gf was designed like that it should work, right? ;-)
What about you, what wc components do you have?

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Id recommend a tbalancer fan contrller they come with sensors and are software setup in Windows and easily power fans and pumps to a controlled temp, I dont think a gfx card fan header is able to give out pump wattage , 2 fans max imho and pumps can easily pull a lot of power especially at start up, too much imho for mobo headers, ive found max speed pump well mounted and controlled push pull fans ideal and quite enough.

Those t balancer sure look hard to control, I wad hoping to let the motherboard do everything automatically

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Well you can setup the fans off mobo headers just permanently power the pump direct from psu , I sit my pumps on a few layers of filter/foam or susspend them from something so the sounds minimal and its best anyway to have high pressure and flow as fans can be set lower and quit err whilst cooling well the tbalancer is sweet very easy to use with win7 but admittedly not necessary.

Oh and ive two gpus in a single loop with a cpu and they all stay within ten degrees package temp and the water gains 5-10 degrees max all round the loop so controlling the temp of it all off just the cpus temp.

Well you can setup the fans off mobo headers just permanently power the pump direct from psu , I sit my pumps on a few layers of filter/foam or susspend them from something so the sounds minimal and its best anyway to have high pressure and flow as fans can be set lower and quit err whilst cooling well the tbalancer is sweet very easy to use with win7 but admittedly not necessary.

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I don't think you know what pump he is talking about . This watercooling system he is using is an asetek AIO. So the pump is built into the waterblock, the pump gets it's power from the GPU fan header plug. The units he is using are the 760gc and a 760gf.